The California Supreme Court's ruling in favor of gay marriage spurred Ellen DeGeneres into action -- she announced during the taping of her talk show Thursday that she and longtime girlfriend Portia de Rossi, who was in the audience, are going to get married, the Associated Press reports. (The show aired Friday.)

Same-sex couples may be able to get married in as little as a month, according to the AP, although opponents say they are readying a constitutional amendment banning gay marriage for the November ballot.

DeGeneres, who dated Anne Heche after she came out in 1997, and de Rossi (who previously dated Francesca Gregorini, the daughter of Barbara Bach and step-daughter of former Beatle Ringo Starr), have been dating since 2004.

It would be the most high-profile same-sex wedding since Elton John married (or, to be technical, civilly unioned) longtime partner David Furnish in England in 2005 and partied with a celebrity-packed crowd including Ringo Starr, Victoria Beckham, and Claudia Schiffer.